syzkaller login: [ 38.805725] BUG: Bad rss-counter state mm:00000000bd95227e type:MM_FILEPAGES val:33 [ 38.806455] BUG: Bad rss-counter state mm:00000000bd95227e type:MM_ANONPAGES val:22 [ 38.916633] ================================================================== [ 38.917295] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.917972] Read of size 8 at addr ffff888019d8aa50 by task sshd/219 [ 38.918546] [ 38.918703] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.919332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.920037] Call Trace: [ 38.920265] [ 38.920463] dump_stack_lvl+0x91/0xf0 [ 38.920809] print_report+0xcc/0x620 [ 38.921200] ? __virt_addr_valid+0x102/0x340 [ 38.921624] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922056] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922498] kasan_report+0xbe/0xf0 [ 38.922849] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923292] vma_interval_tree_remove+0xc75/0xec0 [ 38.923723] vma_prepare+0xc54/0x11a0 [ 38.924063] __split_vma+0x5af/0x950 [ 38.924393] ? __pfx___split_vma+0x10/0x10 [ 38.924776] ? find_held_lock+0x2c/0x110 [ 38.925170] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.925567] ? lock_is_held_type+0x9f/0x120 [ 38.925951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.926381] ? mtree_range_walk+0x632/0x900 [ 38.926801] ? mas_walk+0x5c7/0x7c0 [ 38.927143] do_vmi_munmap+0x1f1/0x2b0 [ 38.927492] mmap_region+0x1f9/0x2660 [ 38.927832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.928192] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.928701] ? __pfx_lock_acquire+0x10/0x10 [ 38.929080] ? __pfx_mmap_region+0x10/0x10 [ 38.929465] ? security_mmap_addr+0x7d/0xa0 [ 38.929846] ? get_unmapped_area+0x1f5/0x3f0 [ 38.930241] do_mmap+0x854/0xf00 [ 38.930569] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.930928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.931322] ksys_mmap_pgoff+0x3af/0x500 [ 38.931673] do_syscall_64+0x3f/0x90 [ 38.932008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932469] RIP: 0033:0x7f0313948d82 [ 38.932801] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.934300] RSP: 002b:00007ffeeb5dfdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0313948d82 [ 38.935568] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0312d82000 [ 38.936184] RBP: 00007f0312d82000 R08: 0000000000000009 R09: 0000000000001000 [ 38.936818] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f4fc17f70 [ 38.937427] R13: 00007ffeeb5dfe10 R14: 00007ffeeb5dfe40 R15: 00007ffeeb5e01a0 [ 38.938045] [ 38.938248] [ 38.938401] Allocated by task 212: [ 38.938725] kasan_save_stack+0x22/0x50 [ 38.939085] kasan_set_track+0x25/0x30 [ 38.939426] __kasan_slab_alloc+0x59/0x70 [ 38.939791] kmem_cache_alloc+0x16b/0x370 [ 38.940150] vm_area_dup+0x20/0x160 [ 38.940495] __split_vma+0x170/0x950 [ 38.940831] split_vma+0xc6/0x110 [ 38.941154] mprotect_fixup+0x8d2/0xb30 [ 38.941524] do_mprotect_pkey+0x87e/0xd40 [ 38.941885] __x64_sys_mprotect+0x78/0xc0 [ 38.942262] do_syscall_64+0x3f/0x90 [ 38.942609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943068] [ 38.943224] Freed by task 13: [ 38.943498] kasan_save_stack+0x22/0x50 [ 38.943865] kasan_set_track+0x25/0x30 [ 38.944208] kasan_save_free_info+0x2b/0x50 [ 38.944594] __kasan_slab_free+0x10a/0x190 [ 38.944968] kmem_cache_free+0x10d/0x4d0 [ 38.945337] rcu_core+0x8c8/0x2860 [ 38.945659] __do_softirq+0x1b7/0x7d4 [ 38.945995] [ 38.946152] Last potentially related work creation: [ 38.946608] kasan_save_stack+0x22/0x50 [ 38.946896] __kasan_record_aux_stack+0x8e/0xa0 [ 38.947226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.947600] remove_vma+0x139/0x170 [ 38.947858] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.948181] do_vmi_munmap+0x1f1/0x2b0 [ 38.948467] __vm_munmap+0x138/0x3a0 [ 38.948737] __x64_sys_munmap+0x59/0x80 [ 38.949023] do_syscall_64+0x3f/0x90 [ 38.949294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949665] [ 38.949788] The buggy address belongs to the object at ffff888019d8a9f8 [ 38.949788] which belongs to the cache vm_area_struct of size 168 [ 38.950744] The buggy address is located 88 bytes inside of [ 38.950744] freed 168-byte region [ffff888019d8a9f8, ffff888019d8aaa0) [ 38.951509] [ 38.951625] The buggy address belongs to the physical page: [ 38.951984] page:00000000cc2edc19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d8a [ 38.952577] memcg:ffff88800ec05d01 [ 38.952808] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.953165] page_type: 0xffffffff() [ 38.953411] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.953918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec05d01 [ 38.954408] page dumped because: kasan: bad access detected [ 38.954879] [ 38.955022] Memory state around the buggy address: [ 38.955389] ffff888019d8a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.955916] ffff888019d8a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.956490] >ffff888019d8aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.957062] ^ [ 38.957535] ffff888019d8aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.958111] ffff888019d8ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.958708] ================================================================== [ 38.959357] Disabling lock debugging due to kernel taint [ 40.373286] BUG: Bad rss-counter state mm:0000000006fd0a6d type:MM_FILEPAGES val:33 [ 40.374373] BUG: Bad rss-counter state mm:0000000006fd0a6d type:MM_ANONPAGES val:22 [ 40.772024] BUG: Bad rss-counter state mm:00000000d2ee0dd1 type:MM_FILEPAGES val:33 [ 40.772711] BUG: Bad rss-counter state mm:00000000d2ee0dd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53847' (ECDSA) to the list of known hosts. 2023/06/21 08:44:30 fuzzer started 2023/06/21 08:44:30 dialing manager at localhost:36067 2023/06/21 08:44:30 checking machine... 2023/06/21 08:44:30 checking revisions... [ 41.242334] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:44:30 testing simple program... [ 41.274896] cgroup: Unknown subsys name 'net' [ 41.311263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:44:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c132e RSP=ffff88806ce09960 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff888019e761b0 RIP=ffffffff812d8709 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fff22d0eee8 CR3=000000000ec30000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030333a34343a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000020 RCX=ffffffff818de34c RDX=ffff8880159b51c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888015d1b480 RSP=ffff888019a27c60 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000020 R11=00000000000b6a61 R12=ffff888015d1b558 R13=0000000000000020 R14=ffff888015d1b508 R15=ffff888015d1b558 RIP=ffffffff814c027c RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcf66079900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fcf66630618 CR3=000000000efb8000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000